Contribution of electron-magnon scattering to spin-dependent Seebeck effect in a ferromagnet*

Pure spin-current can be generated from a ferromagnet by applying a temperature gradient across it. This spin current can then be used in various devices such as MRAM where it can be used for magnetization switching. The spin-dependent Seebeck coefficients are responsible for the production of spin-current from a ferromagnet in this case. We solve the Boltzmann's transport equations for conduction electrons in a ferromagnet, considering electron-magnon scattering. Such scattering gives rise to spin dependent Seebeck coefficients. We then estimate the temperature gradient required for switching a nano-magnet by using spin-transfer torque.